A Windows product key is a 25-character code used to activate Windows. It looks like this:
PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
Locate your product key for Windows 10 or Windows 11
Depending on how you got your copy of Windows 10 or Windows 11, you'll need either a 25-character product key or a digital license to activate it. A digital license (called a digital entitlement in Windows 10, Version 1511) is a method of activation in Windows 10 and Windows 11 that doesn't require you to enter a product key. Without one of these, you won't be able to activate your device.
Where to find your product key depends on how you obtained your copy of Windows.
Check any of the following options to view details:
A new PC running Windows
The product key is preinstalled on your PC, included with the packaging the PC came in, or included on the Certificate of Authenticity (COA) attached to the PC. For more info, contact your hardware manufacturer.
A copy of Windows 10 or Windows 11 from an authorized retailer
The product key is on a label or card inside the box that Windows came in. For more info, contact the retailer that sold you Windows 10 or Windows 11.
A digital copy of Windows 10 or Windows 11 from an authorized retailer
Find your product key in the confirmation email you received after buying Windows 10 or Windows 11 in a digital locker accessible through the retailer’s website.
A digital copy from a Microsoft website
The product key is in the confirmation email you received after buying your digital copy of Windows. Microsoft only keeps a record of product keys if you purchased from the Microsoft online store. You can find out if you purchased from Microsoft in your Microsoft account Order history.
Free upgrade to Windows 10
If you upgraded to Windows 10 for free from Windows 7 or Windows 8.1, you should have a digital license instead of a product key.
Microsoft Store App
If you bought Windows 10 or Windows 11 Pro upgrade in the Microsoft Store app, you'll receive a digital license instead of a product key in the confirmation email that was sent to confirm the purchase. That email address (MSA) will contain the digital license. You can use the digital license for activation.
Volume Licensing agreement or MSDN subscription
Your product key is available through the web portal for your program. For more information, see Volume Activation for Windows 10.
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